18 October 2017
⇐20171017 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171019⇒

NOAA
1 Active Region
12684

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W18S26
(270",-508") 		W01-W35
(34) 		4.4 -0.9 -1.5e33
2 W25N71
(130",879") 		E40-W81
(121) 		2.2 1.2 5.6e33
3 E44N20
(-636",260") 		E58-E31
(27) 		1.7 1.4 1.3e33
4 E27S67
(-174",-913") 		E55-W15
(70) 		0.7 -0.7 -2.2e33
5 W46N31
(590",444") 		W44-W49
(5) 		0.4 3.4 8.8e32
6 W59N43
(603",619") 		W52-W71
(19) 		0.1 1.8 2.8e32

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 18-Oct-2017 23:30 UT .